This mining operations center elucidates the importance of mining to everyday life. Exhibits include a walk-through model of an ore crusher, video stations that explain refining processes, and a film about how minerals are actually extracted. The big draw, though, is the yawning open pit of the Mission Mine, some 2 miles long and 1¾ miles wide because so much earth has to be torn up to extract the 1% that is copper. It's impressive, but doesn't bolster the case the center tries to make about how environmentally conscious mining has become. Tours of the pit take a little over an hour; the last one starts at 3:30. In summer, pit mine tours are only on Saturday.